Fix TextEdit/TextArea mouse cursor shape handling logic

Previously IBeamCursor was wrongly shown in case when TextEdit
was readonly and not selectable by mouse. Now ArrowCursor will be shown
in such case. Additionally removed own mouse cursor shape handling logic
in TextArea, so it will be unified now with derived logic from TextEdit.
This is a change from 23f78b6b76fb9350a472485e34857e1a4842e5d3:
we no longer attempt to restore a cursor that was set via setCursor().

[ChangeLog][QtQuick][TextEdit] TextEdit and TextArea now set their own
mouse cursors more consistently, but without regard for any external
call to setCursor().

Fixes: QTBUG-104089
Pick-to: 6.3 6.4
Change-Id: Iba4e0cb55d555b0f360d7856346ff9e8393b9e1e
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

src/quick/items/qquicktextedit.cpp

@@ -1568,15 +1568,20 @@ bool QQuickTextEdit::selectByMouse() const
 void QQuickTextEdit::setSelectByMouse(bool on)
 {
     Q_D(QQuickTextEdit);
-    if (d->selectByMouse != on) {
-        d->selectByMouse = on;
-        setKeepMouseGrab(on);
-        if (on)
-            d->control->setTextInteractionFlags(d->control->textInteractionFlags() | Qt::TextSelectableByMouse);
-        else
-            d->control->setTextInteractionFlags(d->control->textInteractionFlags() & ~Qt::TextSelectableByMouse);
-        emit selectByMouseChanged(on);
-    }
+    if (d->selectByMouse == on)
+        return;
+
+    d->selectByMouse = on;
+    setKeepMouseGrab(on);
+    if (on)
+        d->control->setTextInteractionFlags(d->control->textInteractionFlags() | Qt::TextSelectableByMouse);
+    else
+        d->control->setTextInteractionFlags(d->control->textInteractionFlags() & ~Qt::TextSelectableByMouse);
+
+#if QT_CONFIG(cursor)
+    d->updateMouseCursorShape();
+#endif
+    emit selectByMouseChanged(on);
 }
 
 /*!
@@ -1638,6 +1643,9 @@ void QQuickTextEdit::setReadOnly(bool r)
 
 #if QT_CONFIG(im)
     updateInputMethod(Qt::ImEnabled);
+#endif
+#if QT_CONFIG(cursor)
+    d->updateMouseCursorShape();
 #endif
     q_canPasteChanged();
     emit readOnlyChanged(r);
@@ -2431,7 +2439,7 @@ void QQuickTextEditPrivate::init()
     updateDefaultTextOption();
     q->updateSize();
 #if QT_CONFIG(cursor)
-    q->setCursor(Qt::IBeamCursor);
+    updateMouseCursorShape();
 #endif
 }
 
@@ -2715,9 +2723,8 @@ void QQuickTextEdit::q_linkHovered(const QString &link)
     emit linkHovered(link);
 #if QT_CONFIG(cursor)
     if (link.isEmpty()) {
-        setCursor(d->cursorToRestoreAfterHover);
+        d->updateMouseCursorShape();
     } else if (cursor().shape() != Qt::PointingHandCursor) {
-        d->cursorToRestoreAfterHover = cursor().shape();
         setCursor(Qt::PointingHandCursor);
     }
 #endif
@@ -2728,9 +2735,8 @@ void QQuickTextEdit::q_markerHovered(bool hovered)
     Q_D(QQuickTextEdit);
 #if QT_CONFIG(cursor)
     if (!hovered) {
-        setCursor(d->cursorToRestoreAfterHover);
+        d->updateMouseCursorShape();
     } else if (cursor().shape() != Qt::PointingHandCursor) {
-        d->cursorToRestoreAfterHover = cursor().shape();
         setCursor(Qt::PointingHandCursor);
     }
 #endif
@@ -3001,6 +3007,14 @@ bool QQuickTextEditPrivate::isLinkHoveredConnected()
     IS_SIGNAL_CONNECTED(q, QQuickTextEdit, linkHovered, (const QString &));
 }
 
+#if QT_CONFIG(cursor)
+void QQuickTextEditPrivate::updateMouseCursorShape()
+{
+    Q_Q(QQuickTextEdit);
+    q->setCursor(q->isReadOnly() && !q->selectByMouse() ? Qt::ArrowCursor : Qt::IBeamCursor);
+}
+#endif
+
 /*!
     \qmlsignal QtQuick::TextEdit::linkHovered(string link)
     \since 5.2

src/quick/items/qquicktextedit_p_p.h

@@ -111,6 +111,10 @@ public:
     Qt::LayoutDirection textDirection(const QString &text) const;
     bool isLinkHoveredConnected();
 
+#if QT_CONFIG(cursor)
+    void updateMouseCursorShape();
+#endif
+
     void setNativeCursorEnabled(bool) {}
     void handleFocusEvent(QFocusEvent *event);
     void addCurrentTextNodeToRoot(QQuickTextNodeEngine *, QSGTransformNode *, QQuickTextNode*, TextNodeIterator&, int startPos);
@@ -176,7 +180,6 @@ public:
     Qt::InputMethodHints inputMethodHints;
 #endif
     UpdateType updateType;
-    Qt::CursorShape cursorToRestoreAfterHover = Qt::IBeamCursor;
 
     bool dirty : 1;
     bool richText : 1;

src/quicktemplates2/qquicktextarea.cpp

@@ -425,9 +425,6 @@ void QQuickTextAreaPrivate::readOnlyChanged(bool isReadOnly)
     if (QQuickAccessibleAttached *accessibleAttached = QQuickControlPrivate::accessibleAttached(q_func()))
         accessibleAttached->set_readOnly(isReadOnly);
 #endif
-#if QT_CONFIG(cursor)
-    q_func()->setCursor(isReadOnly && !selectByMouse ? Qt::ArrowCursor : Qt::IBeamCursor);
-#endif
 }
 
 #if QT_CONFIG(accessibility)
@@ -509,9 +506,7 @@ QQuickTextArea::QQuickTextArea(QQuickItem *parent)
     setAcceptedMouseButtons(Qt::AllButtons);
     d->setImplicitResizeEnabled(false);
     d->pressHandler.control = this;
-#if QT_CONFIG(cursor)
-    setCursor(Qt::IBeamCursor);
-#endif
+
     QObjectPrivate::connect(this, &QQuickTextEdit::readOnlyChanged,
                             d, &QQuickTextAreaPrivate::readOnlyChanged);
 }

tests/auto/quick/qquicktextedit/tst_qquicktextedit.cpp

@@ -2586,8 +2586,6 @@ void tst_qquicktextedit::linkHover()
     QCOMPARE(window.cursor().shape(), Qt::IBeamCursor);
     QCOMPARE(hover.last()[0].toString(), QString());
 
-    texteditObject->setCursor(Qt::OpenHandCursor);
-
     QCursor::setPos(linkPos);
     QTRY_COMPARE(hover.count(), 3);
     QCOMPARE(window.cursor().shape(), Qt::PointingHandCursor);
@@ -2595,7 +2593,7 @@ void tst_qquicktextedit::linkHover()
 
     QCursor::setPos(textPos);
     QTRY_COMPARE(hover.count(), 4);
-    QCOMPARE(window.cursor().shape(), Qt::OpenHandCursor);
+    QCOMPARE(window.cursor().shape(), Qt::IBeamCursor);
     QCOMPARE(hover.last()[0].toString(), QString());
 }
 #endif

tests/auto/quickcontrols2/cursor/tst_cursor.cpp

@@ -33,6 +33,7 @@ private slots:
     void editable();
     void pageIndicator();
     void scrollBar();
+    void textArea();
 };
 
 tst_cursor::tst_cursor()
@@ -200,6 +201,19 @@ void tst_cursor::scrollBar()
     QCOMPARE(window->cursor().shape(), textArea->cursor().shape());
 }
 
+// QTBUG-104089
+void tst_cursor::textArea()
+{
+    QQuickTextArea textArea;
+    QCOMPARE(textArea.cursor().shape(), Qt::IBeamCursor);
+
+    textArea.setReadOnly(true);
+    QCOMPARE(textArea.cursor().shape(), Qt::ArrowCursor);
+
+    textArea.setSelectByMouse(true);
+    QCOMPARE(textArea.cursor().shape(), Qt::IBeamCursor);
+}
+
 QTEST_MAIN(tst_cursor)
 
 #include "tst_cursor.moc"